Yes, I see that Totally Wicked is using it in some
juice.
All I could find is this:
"Great for anyone who may be allergic to PG or VG E
juice or E liquids"
I get stomach upset from PG, and for some people's units VG is too thick, so PEG may be offered as an alternative.
You can always cut a little with distilled or purified water, some use alcohol.
30ml PEG400 E Liquid | PEG 400 E-LIQUID |30ml PEG 400 E-JUICE
I've been using some flavors that are in a Triacetin base, I believe that flavor manufaturers are using PG mostley becasue it's a better solvent.
I seem to get that TH off of the Triacetin, but to avoid the little bit of DEG that you get from PG, I'll accept that.
I can't find anything negative about it, but it does have a bitter taste.